nova.conf config options were removed

[Derek Higgins]

As of 2014-11-06 15:00 approx All tripleo jobs are failing

a load of deprecated options have been removed from nova causing the failure

https://review.openstack.org/#/c/132900/
https://review.openstack.org/#/c/132887/
https://review.openstack.org/#/c/132885/
https://review.openstack.org/#/c/132901/

They were deprecated but it looks like no warning were being generated in the logs

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/133212

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/133213

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/133214

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/133215

[Joe Gordon (jogo)]

Not sure why this is marked as a nova bug, you shouldn't be using deprecated config options.

[Joe Gordon (jogo)]

You can use the setting

# Enables or disables fatal status of deprecations. (boolean
# value)
#fatal_deprecations=false

to detect deprecation when they are made.

[Derek Higgins (derekh)]

The reason for the nova bug and the proposed reverts is not because the config options should not have been removed, there was no warnings in the logs about them, which essentially means we didn't know not to use them a problem other deployments will have once this is released.

[Ben Nemec (bnemec)]

fatal_deprecations wouldn't catch this because that only marks deprecations that are logged. These were not (a bug in oslo.config: https://bugs.launchpad.net/oslo.config/+bug/1390408 ), which is why IMNSHO the change should be reverted. The deprecated opts are not hurting anything, and removing them like this has the potential to break deployers with no warning.

[Daniel Berrange (berrange)]

Nova has followed this process of marking the config options deprecated for one release cycle and then deleting them in the second release cycle, for many releases now.

If there are things we can do to make the list of deprecated options be more obvious/visible to end users/downstream apps in future releases, that's great to discuss, but I don't see any reason why we should stop following our existing process for removal of deprecated options.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/133427

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/133427
Committed: https://git.openstack.org/cgit/openstack/tripleo-image-elements/commit/?id=8e5ae2618d5e206f4ab9d8262e6287bd278d85af
Submitter: Jenkins
Branch: master

commit 8e5ae2618d5e206f4ab9d8262e6287bd278d85af
Author: Derek Higgins <email address hidden>
Date: Mon Nov 10 10:31:52 2014 +0000

    Switch to current options in nova.conf

    Switch some nova.conf options to the most current name/group,
    the old names were deprecated in nova in Juno and have now
    been removed.
    Closes-Bug: #1390427

    Change-Id: I7eb06d70aba99592152559252fb2bf2058dc39c6

[Dan Prince (dan-prince)]

I've always viewed fatal_deprecations as a test time flag. Sure you could use it in production but that was not the original intent.

In general I would agree that logging a simple warning would suffice, regardless of whether fatal_deprecation=true is set. This is however a general problem and not just related to these flags. Given that we are removing so many options (which were silently deprecated) I don't see any harm in re-adding them. What I'm getting at is... this is probably going to break someone because we were in stealth deprecation mode here...

[OpenStack Infra (hudson-openstack)]

Change abandoned by Sean Dague (<email address hidden>) on branch: master
Review: https://review.openstack.org/133212

[OpenStack Infra (hudson-openstack)]

Change abandoned by Sean Dague (<email address hidden>) on branch: master
Review: https://review.openstack.org/133213

[OpenStack Infra (hudson-openstack)]

Change abandoned by Sean Dague (<email address hidden>) on branch: master
Review: https://review.openstack.org/133214

[OpenStack Infra (hudson-openstack)]

Change abandoned by Sean Dague (<email address hidden>) on branch: master
Review: https://review.openstack.org/133215

[Doug Hellmann (doug-hellmann)]

We're tracking this in oslo.config with https://bugs.launchpad.net/oslo.config/+bug/1390408, which more clearly states in the bug description what we need to do.